odd, prime · 43rd positive integer
The number 43
43 is an odd prime number. It is the 43rd positive integer.
Quick reference
| Prime factorization | 43 (prime) |
| Divisors | 1, 43 |
| Binary | 101011 |
| Hexadecimal | 0x2B |
| Roman numeral | XLIII |
| Digit sum | 7 |
| Properties | odd, prime |
Frequently asked
Is 43 a prime number?
Yes. 43 is prime — its only divisors are 1 and itself.
What are the factors of 43?
The factors (divisors) of 43 are 1, 43.
What is 43 in binary?
43 in binary is 101011. In hexadecimal it's 2B.
What is 43 as a Roman numeral?
43 in Roman numerals is XLIII.
What's the digit sum of 43?
Adding the digits of 43: 4 + 3 = 7.